Open box EBC RK821 – EBC Brakes SAAB 9-5 3.0 Turbo RK Series Premium Rotors – Front Pair; 1999-1999. EBC Brakes RK Series Premium Brake Discs have the highest integrity and product quality on the aftermarket. An OE quality replacement disc, made of the finest grade iron and a perfect replacement disc for any car. All EBC Premium Brake Rotors or discs are cast to a material strength of 150 N/m2 with a tightly controlled surface hardness variation less than 20 HB and are precision CNC machined to a surface tolerance of less than 0.05 mm. That is two thousandths of an inch. For this reason EBC recommends a maximum runout of fitted rotors of 0.1 mm or .004 inches (4 thousandths) TIR which means total indicator reading on a dial gauge. Rotor Diameter: 11.3